Fuse puller



Sept. 13, 1932 H. c; FISKE 1,876,892

FUSEPULLER Filed Feb. 27. 1929 2 Sheets$heet 1 INVENTOR P /HQaLO C. Hs/(E ATTORNE S Sept. '13, 1932. H. c. 'FISKE 1,876,892

FUSE FULLER Filed Feb. 27. 1929 2 Sheets-Sheet 2 INVENTOR' I g ema 55x5 and} ATTOR N EYS I HAROLD G. FISKE, F MINNEAPOLIS; MINNESOTA, ASSIGNOR 'IO JAMES R- MISSOURI, A CORPORATION OF MISSOURI v I which may Patented Sept. 13, 1932 Gil-Niven m conrona'rron, or s'r. Louis,

TES PATENT OFFICE FUSE PULLER Application filed February 27, 1929. Serial m5. 343,204.

This invention relates ,tofuse handling equipment, and particularly to an improved fuseand wire be designated as a fuse puller.

An object of the'present invention is to provide an adjustable, positively-actuated clamp, for use 1n removing and inserting a great variety of the'different types of fuse holders and fuses, particularly those used in connection with overhead line installations. Afurther object is'to provide an adjustable clamp of the general type recited, with means for adjust ng and actuating such a clamp, with entire safety to the operator, at

- proved fuse-cartridge clamp or puller, which a wdistance from the work or apparatus with which the clamp is used. i

A further object is to --prov1de a device of" the type described, whichmay be universally, angularly positioned with respect to the clamp actuating means.

A further object is to provide a fuse puller with an adjustably offset operating head, whereby an operator or linemanris per'mltted to work from one side of, instead of d1- I rectly under, the fusevor other apparatus engaged by the clamp.

An additional object is to provide a clamping fuse puller, havingan opera-ting'head embodying means for safe locking engagement, without the necessity of adjustment, with the usual pull ring of fuses and disconnects; such head also embodying a clamp of adjustable opening for engaging the body or removable portions of, pole-type fuse F plugs, expulsion cutouts, disconnect switch blades and other apparatus and kindred nature. Still. a further ob devices of ect is to provide an'im-,

is adaptednot only for use in the removal and insertion of fuses, with their various types of containers, but which is equally adapted for distantly handling energized cables, wires and conductors in general, with absolute safety tothe lineman or operator.

Further objects and advantages of the invention will appear from the following detailed description, and the accompanying drawings, preferred executional embodiment of the handling device of l a typeillustrating by way of example, a

invention, the drawings being briefly described as follows:

Fig. 1 is a. side elevation of the clamping head and. a sectional handle therefor, the

or inserting a fuse cartridge of standard type,

and indicating in dotted lines, an alternate position of the puller in removing or engaging a fuse. cartridge or disconnect blade, I

a handle of"adjustablelength; Fig. 2v is ta is a view .ofthe body portion ofthe equipped with a pull ring; Fig. 6-is a view illustrativelof the manner of engagement of aistandard plug cutout, by my device; and Fig. 7 shows the application of the device for fuse replacement in connection with an expulsion cutout. v V 7 It will be understood that the. following description, as well as the drawings, relate to a single preferred embodiment of the present invent'om which is herein described in detail by way of providing the requisite statu- It will be obvious to those-skilled in the art, that the part's described, and the arrangement and.

thereof, be variedin many r I ways,- withoutdeparting from the spiritland tory example of the invention;

combinations full intendment of the'present disclosure.

'Referring now by numerals t0 the draw-v ings, the fuseipuller or clamp is indicated generally at 8 and comprises abody portion 9, which is provided with a longitudinal bore,

partially internally threaded at 10 and there 7 by adjustably connected to a or stud'll, which is, in turn, and secured as by a end of a handle 14.

socketed at 12 The post 11 is preferthreaded post throughpin 13, to one ably formed of slightly greater length than I I the borethrough the body portion; so as,

when desired, to project upwardly or out wardly therethrough for a purpose hereinafter appearing. To prevent casual or unintentional relative rotation of the recited body portion and stud, it is preferred to provide a frictional retaining means, such as a spring 15, disposed in a transverse aperture 16 in the post 11, so that the spring ends bear against the inside surface of'the body portion.

Extending, preferably at a right angle from the body portion 9, is a threaded stud 17, which, if desired, may be formed initially and integrally with the body portion. This stud serves as a mounting means for a pair.

of relatively pivoted clamping jaws, indicated respectively as 18 and 19. Carried by both, or one only of the jaws, for example, by the jaw 18, is a transverse pivot pin 20, with which is pivotally engaged'th'e opposite jaw 19. 'Disposedbetween the clamping jaws, and by'preference carried by the pin 20, is a coiled, torsion spring 21, the opposite ends of which are extended upwardly a short distance between the jaws in a manner tending to spread the jawsapart. For strength and saving of metal, each of the clamping jaws 18 and 19 is preferably formed substantially U shaped in section. Notonly the clamping jaws,fb ut, if desired, the body portion 9, and the threaded-post or stud 11, may be separately formed as bronze or brass castings. Any other suitable metal may, of course, be used and, if desired, some or all of the parts .ldaisc'ribed may be formed by forging or the In a portion thereof depending from'the pivot 20, the jaw 18 includes, preferably as an integral part thereof, a ratchet member consisting of an annular portion 22, (Fig. 4), the inner face of which is provided with notches 23. Adaptedfor engagement in the recited notches, one at a time, is a projection 24, formed on the front or outer side of the body portion 9 to provide an angular adjustment of the clamping jaw assembly relative to the body portion. To this end, the threaded post or stud 17 is'provided with a wing nut or the equivalent 25, which, upon being loosened, permits a ready adjustment of the jaw assembly relative to the axis of the body portion, and hence relative to the actuating handle: 7

One of'the clamping jaws, for example, the j aw 18, is provided near its outer end with an angular projection or hook 26, preferably formed integrally with the j aw, and termin atlng in an enlargement or head 27. This extension is adaptedfor en agement with, by extending through, the usual opening of the pull ring of a disconnect switch blade, or of a fuse cartridge assembly, in a manner hereinafter more fully setforth, and as best appearing fromFig. '5.

Since the assembly comprising the jaws 18 and 19 and related parts, is adapted to be angularly adjusted relative to the body portion,

sees

as described, provision must be made for insuring the actuation of the jaws for clamping action, irrespective of their angular position. This provision is found in a somewhat rounded head portion 28 on the top of the threaded post 11. This head or end portion engages, in assembly, an arcuate cam surface 29, formed, say, on the jaw 19, the particular area engaged depending upon the angular position of the assembly of clamping jaws.

From the construction of the clamping aw assembly and the relation of the jaws to each other and to the spring 31 disposed therebetween upon the pivot 20, it will be seen that the tendency of this spring to spread the jaws, results in a tendency of the same spring to seat the depending portion 22 more firmly into engagement with the described projection 24 in a manner tending to prevent relative disengagement of these parts. At the same time, the portion of the j aw 18 just below the pivot, tends to be forced outwardly by the spring in a manner enabling the use of the spring in looking the wing nut 25 upon the stud or post 17, and preventing unintentional disturbance of this adjustment.

Due to the fact that it is often desired to employ the present device as a means for grasping, in clamping engagement, the body of a fuse cartridge, or similar outdoor equipment which includes a porcelain insulating body, any possible breakage of such a porcelain body is prevented by providing the jaws with a cushioning and gripping covering, such as the flexible rubber bands, indicated at 30. In order to position such bands on the jaws, notches or recesses 31 are formed in each of the jaws to provide a securing seat for he i band.

jaws may extend entirely thereover, and may be vulcanized in place on the jaws so as to constitute a permanently secured covering. I prefer, however, the use of soft relatively flexible rubber covering, by reason of its ease of replacement and better gripping power.

The manner of use and operation, aswell as the more obvious applications of my device, are thought to be apparent from the above detailed description of parts. The angle at which the jaw assembly is to be adjusted relative to the handle, may bereadily determined by the operator or lineman, and quickly adjusted by loosening the wing nut 25, setting the jaw members at the desired angle, and clamping them in place by taking up the wing nut. The desired length of handle is obtained by the addition or removal of the desired number of sections 32, certain of which are provided with sockets 33, apertured as shown at 34c, and others thereof having ferrules 35 each provided with a spring pressed plunger 56, disposed in a suitable recess. Upon connecting the portions 83 and 35, the sections are locked together, and against re1ative rotation by engagement of the apertures If desired, the rubber covering of the necessary to accommodate the object to be engaged thereby. Upon application of one of the jaws to the surface, for example, of a fuse cartridge, as shown in Fig. 5, the handle is rotated, and the head is prevented from rota- "tion therewith. The corresponding rotational movement given the stud 11 within the body portion 9, results in the extension of the threaded portion, with its rounded head 28, to engage the arcuate cam surface 29 on the jaw 19. Continued rotation causes the jaws to grasp the article to be engaged. and this clamping pressure isunder the full control of the operator at all times. Upon bringing the aws into gripping engagement with the article, the manner of use will be obvious. Release of the clamping jaw assembly is, of course, effected by rotation of the handle and the stud in the opposite direction.

It will be seen that, for themanipulation of apparatus provided with a pull ring, such as the fuse cartridge shown in Fig. 5, no adjustment of the jaws is required, since the operation may be effected merely by the engagement of the hook 26 with the pull ring;

" the terminal projection 27 serving to prevent unintentional disengagement of the hook and the ring.

Due to the substantially rectilinear contact between the outer ends of the jaw members 18 and 19, it will be seen that, if desired, the.

jaw members may be clamped together so as entirely to embrace an ob ect therebetween. This feature is of value in enabling the use of my device as a means for handling energized wires or cables in a manner which will appear obvious.

It will be seen that the described device. is of sturdy, yet economical construction, comprising a minimum number of parts. The handle being adjustable in length and formed of an insulating material, such as wood, for example, permits of using the'device on live lines and in connection with energized apparatus, with perfect safety to the operator. A much wider range of uses of the device is contemplated than is suggested by the few remarks herein set forth.

It is believed that the present invention provides an apparatus of great adaptability, and a high degree of safety, in fulfillment of the objects set forth above.

I claim as my invention:

1. In a distantly operable clamp for electrical apparatus, a pair of clamping jaws, a handle associated with said jaws for rotation relative thereto, a body member having a threaded bore coaxial with the handle, a pivot stud projecing laterally from the body,

, one of said jaws having an aperture adapted threaded bore, said member being operatively associated with the handle and operatively engaging said curved seat.

2. In an extensible device adapted for use as a fuse puller or the like, a handle, a clamping head secured to a terminal section of said handle and comprising a socketed portion engaging the end of the handle, an upstanding threaded stud supported upon the socke-t-' ed portion, a body portion having a longi-- tudinal bore, internally threaded and adapted thereby for the reception of said stud, said stud projecting outwardly through said bore; an angularly disposed post carried exteriorly of said body portion, a pair of clamping jaws, one of said jaws having an aperture adapted to accommodate said post, means for securing said jaws onto the body portion in angularly adjustable relation, said means comprising a nut disposed upon said post and a ratchet constituted by aportion of one ofsaid jaws and a projection on said body portion; a pivot between said jaws, a spring carried by said pivot and tending to spread said jaws into open position, and means forming an arcuate camsurface on one of said jaws, adapted for engagement by said threaded stud upon rotation of the handle, to urge the jaws toward their closed, clamping position.

3. A handling device of the class described 7 comprising a handle, a sleeve in threaded engagement therewith, a part pivotally carother'in a general direction angular to the general direction of swinging movement of the part, and 'coacting means carried by the handle and the jaws for moving said jaws one towards the other upon rotation of the handle in said sleeve in one direction.

. 4-, A handling device of the class described comprising a handle, a sleeve in threaded en-' gagement therewith, a part pivotally carried by the sleeve, clampingjaws mounted upon said part for movement one towards the other in a general direction angular to the general direction of swinging movement of the part, said handle upon rotation in one direction moving the jaws one towards the other, and means for braking the relative rotation of the handle and sleeve.

5. In a distantly operable clamp for electrical apparatus, including a pair of clamping aws, a handle having a threaded stud at no I body member having a threaded opening through which the stud is adapted to operate, one of said jaws being normally secured in adjusted relation to, and adapted to be angularly offset from the body portion, the other jaw being freely movable to and from the secured jaw; a threaded clamping member extending laterally from the body member and through the secured jaw, and adapted to permit angular adjustment thereof with respect-to the body; a pivot carried by the secured jaw and serving to position the movable jaw for abutting engagement by said threaded stud, said stud being arranged, upon rotation of the handle, to operate the movable jaw into clamping relation with the secured jaw about an axis normal to that of the adjusting movement of the aws.

6. In a device for distantly engaging electrical apparatus, a body portion having an internally threaded bore, a pair of clamping jaws, one thereof being adjustably secured in position on the body portion and the other relatively movable'tor clamping actuation, a handle for the device, a threaded extension on the handle, coacting with the threaded bore of the body portion, a pivot for the fixed jaw, carried by the body and adapted to permit angular adjustment of said pair of jaws relative to the handle, a pivot for the movable jaw, carried by the normally fixed jaw, and resilient means for actuating the movable jaw toward open position, said extension being rotatable with the handle, and adapted, upon rotation of the handle, to extend through said bore into pressing engagement with said movable jaw.

7. In a device for manipulating overhead electrical apparatus, a clamping head including an internally threaded sleeve, a pair of clamping one thereof being adjustably secured to the sleeve, and the other mounted for pivotal movement on the secured jaw, a handle having an end portion in abutting relation with the last recited jaw and threadedly disposed in said sleeve, means for angularly adjusting and securing said jaws relative to said body, said means including a threaded pivot carried by the body, and a nut coacting with the pivot.

8. In a device for distantly manipulating electrical apparatus, a handle terminating at one end in an axially projecting, threaded stud, a clamping head including a tubular body, internally threaded to accommodate said stud, and a pair of clamping jaws, one thereof being normally fixed in position, and the other movable, said stud engaging the movable jaw for clamping actuation thereof, upon rotation of the handle in one direction, relative to the clamping head, resilient means associated with said jaws for actuating the movable jaw toward open position, a pivot for said movable jaw carried by the normally fixed jaw, a second pivot projecting from the body and extending through said fixed jaw, and threaded means for securing the normally fixed jaw in selective offset positions relative to the body and handle.

I-IARQLD C. FISKE. 

